Adapter



FIG. 1 is a top front perspective view of an adapter showing the claimed design;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the figures, and the areas within the broken lines, show portions of the adapter that form no part of the claimed design. 

CLAIM The ornamental design for an adapter, as shown and described. 